Ofcourse people get in to trouble b/c its an "easy" mountain...so they go up much to quick and get sick.

I have no idea if sir hillary had trouble but it could well have been so....i shall look into it when i have the time.As on all big mountains..take it easy and take your time.On Kili it should not be a problem to summit then. just take 7 days instead of the usual 5...50% doenst make it b/c of that short acclimatisation.